#include<stdio.h>
int main()
{
	float a,b,sum;
	char ch;
	printf("please import count\n");
	scanf("%f%c%f",&a,&ch,&b);
	  if(ch=='+')
	      printf("%.2f+%.2f=%.2f\n",a,b,a+b);
	  if(ch=='-')
	      printf("%.2f-%.2f=%.2fn",a,b,a-b);
	  if(ch=='*')
	      printf("%.2f*%.2f=%.2f\n",a,b,a*b);
	  if(ch=='/')  
	      if(b!=0)    
	          printf("%.2f/%.2f=%.2f\n",a,b,a/b);
          else 
		       printf("inported datas error\n");
	return 0;       		   
}
